sksurgerycalibration.algorithms.sphere_fitting module

Functions used by calibration the calibration routines

sksurgerycalibration.algorithms.sphere_fitting.fit_sphere_least_squares(coordinates, initial_parameters, bounds=((-inf, -inf, -inf, -inf), (inf, inf, inf, inf)))

Uses scipy’s least squares optimisor to fit a sphere to a set of 3D Points

Parameters:

• coordinates – (x,y,z) n x 3 array of point coordinates
• parameters (initial) – 1 x 4 array containing four initial values (centre, and radius)

Returns:

x: an array containing the four fitted parameters

Returns:

ier: int An integer flag. If it is equal to 1, 2, 3 or 4, the solution was found.